extunix: Alpine libexecinfo-dev pkg was available from 3.5 to 3.16

Commit removing the package:
https://git.alpinelinux.org/aports/commit/?id=50795a14dee6

Author: MisterDA

packages/extunix/extunix.0.3.2/opam

@@ -57,7 +57,7 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/ygrek/extunix.git"
-depexts: [["libexecinfo-dev"] {os = "alpine"}]
+depexts: [["libexecinfo-dev"] {os = "alpine" & "3.5" <= os-version & os-version < "3.17"}]
 url {
   src: "https://ygrek.org/p/release/ocaml-extunix/ocaml-extunix-0.3.2.tar.gz"
   checksum: [

packages/extunix/extunix.0.4.0/opam

@@ -57,7 +57,7 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/ygrek/extunix.git"
-depexts: [["libexecinfo-dev"] {os = "alpine"}]
+depexts: [["libexecinfo-dev"] {os = "alpine" & "3.5" <= os-version & os-version < "3.17"}]
 url {
   src:
     "https://github.com/ygrek/extunix/releases/download/v0.4.0/extunix-0.4.0.tbz"

packages/extunix/extunix.0.4.1/opam

@@ -57,7 +57,7 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/ygrek/extunix.git"
-depexts: [["libexecinfo-dev"] {os = "alpine"}]
+depexts: [["libexecinfo-dev"] {os = "alpine" & "3.5" <= os-version & os-version < "3.17"}]
 url {
   src:
     "https://github.com/ygrek/extunix/releases/download/v0.4.1/extunix-0.4.1.tbz"